Field 9-207-5 Reservoir Report
Nearby: Field Sedgwick 9-394-1
Last Updated: December 8, 2025
Field 9-207-5, also known as 204w09, is a federal-owned dam located in Weston, Wyoming, specifically in the city of Edgemont.
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Summary
This earth dam, designed by USDA NRCS and completed in 1965, serves multiple purposes such as fire protection, stock watering, and creating a small fish pond. With a height of 29 feet and a length of 395 feet, this dam has a storage capacity of 72 acre-feet and covers a surface area of 9 acres.
Situated on the South Field Draw river, Field 9-207-5 is regulated by the State of Wyoming and falls under the jurisdiction of the State Engineer's Office. Although the dam is classified as having a low hazard potential and a moderate risk assessment, it has not been rated for its condition. The last inspection was conducted in June 2010, with an inspection frequency of 10 years. Despite its relatively low hazard potential, the dam's spillway type is uncontrolled with a width of 60 feet, capable of handling a maximum discharge of 1780 cubic feet per second.
Field 9-207-5 is managed and funded by the Forest Service, with responsibilities for design, construction, regulation, inspection, and operation falling under their jurisdiction. The dam's location in a rural area with a small drainage area of 2.2 square miles emphasizes its importance for local fire protection, agricultural activities, and recreational use. As climate change continues to impact water resources, understanding and maintaining structures like Field 9-207-5 is crucial for ensuring water security and safety in the region.
Year Completed |
1965 |
Dam Length |
395 |
Dam Height |
29 |
River Or Stream |
SOUTH FIELD DRAW |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
23 |
Drainage Area |
2.2 |
Nid Storage |
72 |
Structural Height |
34 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Field 9-207-5